The diagram compares the planets of the inner solar system to Kepler-62, a five-planet system about 1,200 light-years from Earth in the constellation Lyra. The five planets of Kepler-62 orbit a star classified as a K2 dwarf, measuring just two-thirds the size of the Sun and only one-fifth as bright. At 7 billion years old, the star is somewhat older than the Sun. The green areas mark each star's habitable zone. // NASA Ames/JPL-Caltech